Griffonia simplicifolia (syn. Bandeiraea simplicifolia Benth.) is a woody climbing shrub native to West Africa and Central Africa. It grows to about 3 m, and bears greenish flowers followed by black pods. The seeds of the plant are used as a herbal supplement for their 5-Hydroxytryptophan content. 5-Hydroxytryptophan also known as 5-HTP is an important building block for the human body to form serotonin. Serotonin plays an important role in the body specially as a "neurotransmitter" to transport signals between neurons in the nervous system.

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